Ahmad Azmin Mohamad

This book offers a comprehensive exploration of reduced graphene oxide (rGO), a material at the forefront of energy storage technology, particularly in supercapacitors. Focused on researchers, engineers, and students in materials science and energy storage fields, this book systematically covers the synthesis, properties, and applications of rGO, emphasizing its potential to revolutionize supercapacitor performance through enhanced energy density, capacitance, and stability. This book is crucial for those involved in energy storage research and development because it addresses the growing need for materials that can offer higher energy density and better cycle life in supercapacitors. By focusing on rGO, a material that combines the best properties of graphene and graphene oxide, the book provides a pathway to overcoming the limitations of current energy storage systems. This book is designed for researchers, engineers, students, and professionals in the fields of materials science, nanotechnology, and energy storage, particularly those focused on the development of next-generation supercapacitors and related technologies.

This book focuses on the study of synthesized ZnO powder using Zn(CH3COO)2·2H2O precursor, methanol (as solvent), and sodium hydroxide (NaOH) to vary the pH. The successfully synthesized ZnO powder from the sol-gel centrifugation and sol-gel storage methods were characterized and investigated by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, UV–visible spectroscopy, and photoluminescence test to compare the properties of the nanoparticles. The best characteristic of the ZnO powder from both methods was observed when the powders were coated on an ITO glass to fabricate a PEC. The current density–voltage performances of both PECs were investigated under luminescent and dark conditions.